Remove som GYP annotations, remove unused manifest.

android_webview/test/BUILD.gn

Index: android_webview/test/BUILD.gn
diff --git a/android_webview/test/BUILD.gn b/android_webview/test/BUILD.gn
index 0148f7be2636e2b19ab4a6abce33007010b673f7..2db4c1963f4ab45e3fe12ad7c3459b8681b49f06 100644
--- a/android_webview/test/BUILD.gn
+++ b/android_webview/test/BUILD.gn
@@ -15,7 +15,6 @@ group("test") {
   ]
 }
 
-# GYP: //android_webview/android_webview_tests.gypi:android_webview_apk
 android_apk("android_webview_apk") {
   deps = [
     ":android_webview_apk_assets",
@@ -85,7 +84,6 @@ android_assets("android_webview_apk_assets") {
   ]
 }
 
-# GYP: //android_webview/android_webview_tests.gypi:libstandalonelibwebviewchromium
 shared_library("libstandalonelibwebviewchromium") {
   sources = [
     "../lib/main/webview_entry_point.cc",
@@ -97,7 +95,6 @@ shared_library("libstandalonelibwebviewchromium") {
   configs -= [ "//build/config/android:hide_native_jni_exports" ]
 }
 
-# GYP: //android_webview/android_webview_tests.gypi:android_webview_test_apk
 instrumentation_test_apk("android_webview_test_apk") {
   apk_name = "AndroidWebViewTest"
   apk_under_test = ":android_webview_apk"
@@ -210,7 +207,6 @@ instrumentation_test_apk("android_webview_test_apk") {
   additional_apks = [ "//net/android:net_test_support_apk" ]
 }
 
-# GYP: //android_webview/android_webview_tests.gypi:android_webview_unittests
 test("android_webview_unittests") {
   # Tests do not require any data, but our dependencies pull a lot in.
   ignore_all_data_deps = true
@@ -257,7 +253,6 @@ android_assets("android_webview_unittests_assets") {
   ]
 }
 
-# GYP: //android_webview/android_webview_tests.gypi:android_webview_unittests_java
 android_library("android_webview_unittests_java") {
   testonly = true
   deps = [
@@ -272,7 +267,6 @@ android_library("android_webview_unittests_java") {
   ]
 }
 
-# GYP: //android_webview/android_webview_tests.gypi:android_webview_unittests_jni
 generate_jni("android_webview_unittests_jni") {
   jni_package = "android_webview_unittests"
   sources = [
@@ -281,7 +275,6 @@ generate_jni("android_webview_unittests_jni") {
   ]
 }
 
-# GYP: //android_webview/android_webview_tests.gypi:libdrawgl
 shared_library("libdrawgl") {
   sources = [
     "shell/src/draw_gl/draw_gl.cc",